a friend has e-mailed the photos to us. as far as we know, he and his 17-year-old son william have not been seen since the explosion. friends say they have searched all around the shelter and called around to hospitals but have not been able to find them. the father and son lived on claremont drive, the hardest hit area of that disaster. >>> coming up at 7:00 on today at the bay, could it have been prevented. a pg&e document with explosive details about the gas line in san bruno. that story and all the day's top news coming up at 7:00. right now, back to the "today" show. >>> we're back on this sunday morning. september 12th, 2010. outside on the plaza i'm >>> we're back on this sunday morning.ç september 12th, 2010. outside on the plaza i'm jenna wolf with carl quintanilla filling in for lester this morning. and doing a mighty fine job. >> it's nice to be with you, as always. >> so nice to be standing next to you as well. >>> coming up, new details emerging about the royal wedding of prince william and kate middleton. th